# killall -9 X

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aspell is a command-line spell checker. It is a replacement for the older ispell. It can be used to manage dictionaries, to check a complete file, or words typed in your terminal, among other uses.
We can invoke aspell this way:
$ aspell -a --lang=en
@(#) International Ispell Version 3.1.20 (but really Aspell 0.60.3)
This leaves us with a prompt in which we can type a word. For instance, if we type:
@(#) International Ispell Version 3.1.20 (but really Aspell 0.60.3)
hello
*
The asterisk indicates that aspell found the word in the dictionary. On the contrary, if we type:
@(#) International Ispell Version 3.1.20 (but really Aspell 0.60.3)
rescoe
& ...

I have seen people many times doing something like this:
$cat binary_file
The problem with the above is that usually you end up with a prompt that looks like this:
�g`�g���i`�i��k`�kX@l`(l �
Whatever you type, you get garbage in your terminal. In this case, what most people do is to despair and close the terminal, losing the information contained in it.
reset is a command that gets the terminal back to its normal state. Sometimes everything is so mangled that there is no echo from the terminal. Don't panic, just type reset and press ENTER.
If ENTER does not work, try to replace it by ...